CVE-2023-48121

An authentication bypass vulnerability in the Direct Connection Module in Ezviz CS-C6N-xxx prior to v5.3.x build 20230401, Ezviz CS-CV310-xxx prior to v5.3.x build 20230401, Ezviz CS-C6CN-xxx prior to v5.3.x build 20230401, Ezviz CS-C3N-xxx prior to v5.3.x build 20230401 allows remote attackers to obtain sensitive information by sending crafted messages to the affected devices.

Published: 2023-11-28 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-48121 is rated Low Risk (39.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.83%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-48121

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.64% 0.83% +0.19%
2 2025-11-21 0.54% 0.64% +0.10%
3 2025-11-18 — 0.54% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-48121

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]

Weakness enumeration for CVE-2023-48121

Affected software / configurations for CVE-2023-48121

Vendor Product Version Raw CPE
ezviz cs-c6n-a0-1c2wfr_firmware — cpe:2.3:o:ezviz:cs-c6n-a0-1c2wfr_firmware:-:*:*:*:*:*:*:*
ezviz cs-cv310-a0-1c2wfr_firmware — cpe:2.3:o:ezviz:cs-cv310-a0-1c2wfr_firmware:-:*:*:*:*:*:*:*
ezviz cs-c6cn-a0-3h2wfr_firmware — cpe:2.3:o:ezviz:cs-c6cn-a0-3h2wfr_firmware:-:*:*:*:*:*:*:*
ezviz cs-c3n-a0-3h2wfrl_firmware — cpe:2.3:o:ezviz:cs-c3n-a0-3h2wfrl_firmware:-:*:*:*:*:*:*:*

References for CVE-2023-48121

cvelogic Threat Intelligence